Here is an image showing the pin diagram of this transistor.
Classification of hFE
The KTB764-O transistor can have a current gain of 60 to 120. The gain of the KTB764 will be in the range from 60 to 320, for the KTB764-GR it will be in the range from 160 to 320, for the KTB764-Y it will be in the range from 100 to 200.
SMD Version of KTB764-O transistor
The 2SA1364 (SOT-89), 2SA1364-C (SOT-89), BCP52 (SOT-223), BSR30 (SOT-89), FMMTA55 (SOT-23), KST55 (SOT-23) and MMBT4354 (SOT-23) is the SMD version of the KTB764-O transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.
KTB764-O Transistor in TO-92 Package
The 2SB764-D is the TO-92 version of the KTB764-O.
Replacement and Equivalent for KTB764-O transistor